Remove/install BAS diaphragm travel sensor - AR42.31-P-6002SX

MODEL 216.### 1# 

MODEL 221.### 1# 

Fig 1: Identifying BAS Diaphragm Travel Sensor Components

Courtesy of MERCEDES-BENZ USA

	Remove/install
1	Operate the brake pedal several times when the engine is switched off	Until the vacuum in the brake booster (A7/7) is reduced
2	Detach vacuum line (1) from brake booster (A7/7) and place to one side	Seal the vacuum line (1) and the connection on the brake booster (A7/7) in order to prevent the ingress of foreign objects.	Fig 2
3	Disconnect connector (A7/7x1)
4	Pry circlip (2) out of groove (arrow)	Installation:  Note correct seating of circlip (2).
5	Pull out diaphragm travel sensor (A7/7b1).
6	Check O-ring (3) on diaphragm travel sensor (A7/7b1) and replace if necessary
7	Install in the reverse order

Fig 2: Identifying Set Of Stop Plugs (129 589 00 91 00)

Courtesy of MERCEDES-BENZ USA